Re: [PATCH 7/8] Revert "ext4: avoid deadlocks in the writeback path by using sb_getblk_gfp"

[Michal Hocko]

On Mon 16-01-17 22:01:18, Theodore Ts'o wrote:
> On Fri, Jan 06, 2017 at 03:11:06PM +0100, Michal Hocko wrote:
> > From: Michal Hocko <mhocko@xxxxxxxx>
> > 
> > This reverts commit c45653c341f5c8a0ce19c8f0ad4678640849cb86 because
> > sb_getblk_gfp is not really needed as
> > sb_getblk
> >   __getblk_gfp
> >     __getblk_slow
> >       grow_buffers
> >         grow_dev_page
> > 	  gfp_mask = mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS) | gfp
> > 
> > so __GFP_FS is cleared unconditionally and therefore the above commit
> > didn't have any real effect in fact.
> > 
> > This patch should not introduce any functional change. The main point
> > of this change is to reduce explicit GFP_NOFS usage inside ext4 code to
> > make the review of the remaining usage easier.
> > 
> > Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
> > Reviewed-by: Jan Kara <jack@xxxxxxx>
> 
> If I'm not mistaken, this patch is not dependent on any of the other
> patches in this series (and the other patches are not dependent on
> this one).  Hence, I could take this patch via the ext4 tree, correct?

Yes, that is correct

-- 
Michal Hocko
SUSE Labs